CN2095419U

CN2095419U - Measuurer for viscosity of well liquid

Info

Publication number: CN2095419U
Application number: CN 91211576
Authority: CN
Inventors: 方荣贤; 沈岳崇
Original assignee: DRILLING TECHNOLOGY INST SHENGLI PETROLEUM ADMINISTRATION
Current assignee: DRILLING TECHNOLOGY INST SHENGLI PETROLEUM ADMINISTRATION
Priority date: 1991-04-25
Filing date: 1991-04-25
Publication date: 1992-02-05

Abstract

The utility model provides an instrument which automatically measure the viscosity and the weight (density) of drilling fluid, which is composed of a measuring body, a rotating cylinder, a bearing, etc. The utility model is characterized in that the upper end of the measuring body is connected with a micro torque sensor, and the rotating cylinder is directly coupled with a torque motor. The micro torque sensor is directly connected with an SCM, and the rotation speed output end of the torque motor is connected with a pin phase ring and the SCM through a photoelectric code disk. The rotation speed control output end of the SCM is connected with the torque motor through the pin phase ring and driving control. Consequently, the SCM can carry out program control to different test contents, process measuring results, and print measuring data and fluid variation characteristic curves.

Description

Measuurer for viscosity of well liquid

The utility model belongs to the drilling fluid viscosity measurement mechanism.

At present, drilling fluid viscosity is measured rotational viscosimeter commonly used and funnel viscosimeter, finishing weigh (density) with the density scale measures, funnel viscosimeter adopts manual Chronograph Measuring Time, rotational viscosimeter (Fann viscosimeter) has mechanical speed change and automatically controlled gear shift mode, measures shear stress with the torsion of spring, with range estimation index dial value of reading and hand-kept, error is big, also is not easy to data processing.

The utility model is exactly very above-mentioned shortcoming to be designed, it changes mechanical measuring means into the measurement of electricity, be exactly upper end and directly coupling of micro-torque sensor ［ 2 ］ with measuring body ［ 1 ］, temperature sensor ［ 7 ］ is installed in the 1-10mm place, below in measuring body ［ 1 ］ and rotating cylinder ［ 4 ］ gap, micro-torque sensor ［ 2 ］ directly is connected with single-chip microcomputer ［ 13 ］, the rotating speed output terminal of torque motor ［ 10 ］ joins through photoelectric code disk ［ 11 ］ and phaselocked loop ［ 12 ］ and single-chip microcomputer ［ 13 ］, the rotating speed control output end of single-chip microcomputer ［ 13 ］ joins through phaselocked loop ［ 12 ］ and drive controlling ［ 9 ］ and torque motor ［ 10 ］, and the direct and single-chip microcomputer ［ 13 ］ of LOAD CELLS ［ 8 ］ and funnel ［ 14 ］ joins simultaneously.

The utility model is achieved in that

1, adopts torque motor ［ 10 ］ and the direct-coupled mode of rotating cylinder ［ 4 ］ during drilling fluid viscosity (rotation) is measured.

2, using micro-torque sensor ［ 2 ］ directly shear stress to be converted to electric signal send single-chip microcomputer ［ 13 ］ to handle.

3, adopt single-chip microcomputer ［ 13 ］ system to shear stress, funnel viscosity timing, measurement result is controlled and handled to the measuring process of weigh (density).

4, this device is measured specimen temperature simultaneously when carrying out the drilling fluid rheology feature measurement.

5, single-chip microcomputer ［ 13 ］ timing is adopted in the funnel viscosity timing.

6, (density) the employing LOAD CELLS ［ 8 ］ of weighing is measured.

Description of drawings:

Fig. 1 drilling fluid viscosity measurement mechanism block diagram

1 measuring body, 2 micro-torque sensors, 3 bearings

4 rotating cylinders, 5 containers, 6 drilling fluids

7 temperature sensors, 8 LOAD CELLS

9 drive controlling, 10 torque motors, 11 photoelectric code disks

12 phaselocked loops, 13 single-chip microcomputers, 14 funnels

15 keyboards, 16 printer 17RS-232 interfaces

18 parameters show that 19 rotating speeds show

Existing combination principle block diagram, the utility model will be further described.This device utilizes keyboard ［ 15 ］ to control its working method.Single-chip microcomputer ［ 13 ］ is the rotating speed of follow procedure control moment motor ［ 10 ］ automatically, gathers and deal with data format print or describe the rheological characteristics curve of drilling fluid in accordance with regulations also.

Limit switch in the funnel ［ 14 ］ provides funnel ［ 14 ］, and control signal, the control single chip computer ［ 13 ］ of liquid level carry out timing measuring to the 700ml drilling fluid outflow used time of 500ml up and down.

LOAD CELLS ［ 8 ］ is weighed to drilling fluid, offers the analog signals of single-chip microcomputer ［ 13 ］ electricity, (density) calculating of being removed the peel by single-chip microcomputer ［ 13 ］ then and weigh.

The measurement of drilling fluid viscosity (rotation) is by phaselocked loop ［ 12 ］ speed stabilizing, the programmed control speed change, directly be coupled rotating cylinder ［ 4 ］ rotation of torque motor ［ 10 ］, the shear stress that drilling fluid produced is directly experienced by measuring body ［ 1 ］, send single-chip microcomputer ［ 13 ］ to finish the test of rheological characteristics automatically by micro-torque sensor ［ 2 ］ output electric signal, also measure simultaneously the temperature at that time of sample, concrete metering system has three kinds:

1, six speed test and calculation of parameter:

When being 600,300,200,100,6,3 rev/mins, measures by programmed control rotating cylinder ［ 4 ］ θ of drilling fluid respectively ₆₀₀, θ ₃₀₀, θ ₂₀₀, θ ₁₀₀, θ ₆, θ ₃Value, calculate its apparent viscosity, plastic viscosity, yield value, viscosity coefficient, consistency index then, and format print measurements and calculations result in accordance with regulations.

2, gel strength test

Programmed control rotating cylinder ［ 4 ］ stirs 5 seconds of drilling fluid, the θ when stopping then to test 3 rev/mins again 10 seconds with 600 rev/mins rotating speed ₃Value is zero gel.

Programmed control rotating cylinder ［ 4 ］ stirs 5 seconds of drilling fluid, the θ when stopping then to test 3 rev/mins again in 10 minutes with 600 rev/mins rotating speed ₃Value is 10-minute gel strength.

Test automatically format print test result in accordance with regulations.

3, draw the drilling fluid rheology family curve.

Programmed control rotating cylinder ［ 4 ］ rotates with 600,500,400,300,200,100,90,80,70,60,50,40,30,20,10,9,8,7,6,5,4,3,4,5,6,7,8,9,10,20,30,40,50,60,70,80,90,100,200,300,400,500,600 rev/mins rotating speed, measure its corresponding θ value, the rheological characteristics curve of drawing its drilling fluid automatically comes.

Claims

1, a kind of drilling fluid viscosity measurement mechanism, it is by measuring body [1], rotating cylinder [4], bearing compositions such as [3], the upper end that it is characterized in that measuring body [1] is connected with micro-torque sensor [2], rotating cylinder [4] directly is coupled with torque motor [10], temperature sensor [7] is installed in the 1-10mm place, below in measuring body [1] and rotating cylinder [4] gap, micro-torque sensor [2] directly is connected with single-chip microcomputer [13], the rotating speed output terminal of torque motor [10] joins through photoelectric code disk [11] and phaselocked loop [12] and single-chip microcomputer [13], and the rotating speed control output end of single-chip microcomputer [13] joins with torque motor [10] through phaselocked loop [12] and drive controlling [9].

2, drilling fluid viscosity measurement mechanism according to claim 1, it is characterized in that LOAD CELLS ［ 8 ］ and funnel ［ 14 ］ directly and single-chip microcomputer ［ 13 ］ join.